Fluid-fuel burner



Sept 15,

Y o. HARRoD FLUID 'FUEL BURNER Filed Feb. 24, 1925 arrod, by

Famed sept. Y15, 1925.

y,UNITED.-s'rArEs, PATENT foFFflcE;

" ons Hannon, or LAWRENCEVILLE, ILLINOIS.

FLUID-FUEL nomma i Application fuedrebruar-y 241925. serial 1ra-11,217.

To all whomjt may con-cem:

, f Be it known thatgl, OBAHARROD, acitizen 1 of the United, States, residing atV Lawrence'-k vil le,fin`l the county ofyLawrence and State of Illinois, have invented certain new and useful Improvementsy ,in yFluid-Fuel Burn--` ers, of which theifollowing is a specifica- Thisiinvention relates. tofluid fuel burners andvhas for one'offits Objects to provide a device` yof this character which. will besimf` ple ,in construction,V compara-tively inexpensive to manufacture'and more efficient .in

i arly .adapted to handle heavy viscous oilsy usethan thosefthat have 'been heretofore proposed. v

A further object of the invention is to provide a fluid fuelburner which is particu-v which may contain a large amount of free carbonor other suspended mattei', such for example, asy cracking plant residuums, etc.

A still further objectof the inventionis `to provide a burner which will accomplish ro.- ceeds, the invention l consists i in the novelpdea more vperfect,atomization of the loil and which ,will produce a short wide lameiclose tothe. burner tip whereby the deposit ofV soot or carbononthe brick work andl llues of the furnaceresulting from the impinging of long flames which produce only incomplete combustion, Vvvill be eliminated.

lVith the above;and other objects in'vi'ew which will appear as the description tails of construction wand combinations and,

arrangements of parts, morefully and hereinafter disclosed andl yparticularly pointed out inthe appended claims. j jy lReferring tol the accompanying drawing forming a part of this specification 4in which like numeralssdesignate like .parts 44all theview's, Y Q" e 1,

Fig. l is a top plan view of a burner constructed in accordance vvwith the present invention; and, f I

Fig. 2 is a horizontal longitudinal sec; tional view throughthe burner shownri Fig. 1. .Y

Referring more,particularlyv to the said drawings, thenumeral indicates the main bod member of the burner which may conveniently take the form of a casting of substantially of the shape shown. The said body is provided' with two interior chambers, 6 and 7, whichv are connected by a threaded passage 8, which receives'one end of a pipe or tubek9v which projects through the chamber 7 and for some distance'beyond Y theA end of the bod' member 5, as will be readily understood rom the drawings. The

said bodyr member 5 is also providedy atone.

end with a` threaded opening 11 of somewhat largerdiameter than the tube or pipe 9 Whlch opening receives'Y the threaded end l2. of the enlarged outer tube or sleeve 13 which surroundsin spaced relation the tube or plpe 9.l Y Y 1 A y 'Within the tube 9, which constitutes'the oil passage of the burner, there is mounted a screw or spiral 15 which is rotatable therein under the action of apropeller member 16 which is provided at the extreme end ofthe said spiral and beyond the ends-of the tubes 9 and 13.rv The opposite end of the said spiral or screw is provided with a reduced shaft `17 which passes out of the left hand end of the body member 5, througha suit? I able'gland or lstuffing boX'lS and carries a ily wheel'19. v'rlhesaid shaft 17 is grooved` as indicated at 20y to receive the inwardly projectingjend 21 of thethrust member 22 which is secured as by the screws 23 to the v body member 5.

As above stated the outer sleeve 13 is mounted in spaced relationrela-tive to the` inner tube 9, thereby. providing an annular passage 25 which leads from the steam chamber 7 to the dischargeend lof the-` Adjacent thissaid ,discharge end there is provided a. plurality of inclined battle members 26,V (see Fig. 2) whiclrnot.l only serve -to retain the ends of the tubes in' vspaced relation but also to impart a whirlburner.

ing'motion to the steam as it is discharged from thenozzle to impinge upon'the blades of the propelling device 16. i

kOil or other Asuitable fuel may be supplied to the chamber r6 of the burnerl by means of a suitable supply pipe 30 and if desired, a continuation 31 of this pipe maylead from the other side of the bodymember 5 tov therewith.

spective chambers 6 and 7 from the supply pipes 30 and 32, the steam being under pressure will flow from the chamber 7 through the annular passage 25 between the sleeve 13 and the tube 9 past the inclined baffle members 26 and will be discharged with a swirling motion from the burner tip to impinge upon the blades of the propeller 16. The action of the steam so discharged upon the propeller' will produce rotation of the latter with consequent rotation of the screw or spiral which projecting into the oil chamber 6 will have the effect of positively feeding the oil therefrom through the tube 9 to the discharge end thereof, where it `will meet the steam being discharged fromV the passage and be commingled V Ther walls of the tube 9 are preferably made as thin as practicable in order that a portion of the heat of the steam in the surrounding passage 25 may be transferred to the oil during its passage 'through the tube 9 whereby it is preheated,

tothe end thatits atomization at the burner tip will be facilitated. As the said oil is discharged 'from they extreme end of the tube 9 it meets the swirling jet of steam issu- 'ing from the end ofthe passage 25 and this consequent incomplete combustion, will bev swirling action together with the cutting or chopping action of the blades of the propel- 1er 16y will produce an extremelyfine' atomization of the oil and a thorough mixture thereof with the steam. Furthermore the action of the parts including the propeller 16 is such that when the commingled oil and steam are ignited a relatively short wide flame will result, producing substantially complete combustion close to the burner tip with the result that the deposit or carbon or soot which is connnon upon the brick work andrflues of furnaces which employ7 burners producing long narrow flames with eliminated.

Vhile the primary function of the spiral or screw l5 is to feed the oil through the tube 9 it will also serve to keep the oil passage free of deposits of free carbon or other matters which may be suspended in the oil and which in the absence of the screw would tend to clog andV completely close the said tube 9. The operation of the said screw is therein.

While one form of the invention has been illustrated and described, it is obvious that those skilled in the art may vary the details of construction as well as the precise arrangement of parts without departing from the spirit of the invention, and therefore, it is not wished to be limited to the above disclosure except as may be required by the claims.

lVhat I claim is:

1. In a fluid fuel burner, a body member having fuel and steam chambers; a tube providing a fuel discharge passage communicating with said fuel chamber; a sleeve surrounding said tube in spaced relation, providing a steam discharge passage'communicating with said steam chamber; rotatable mechanical'means in said tube for forcing fuel therethrough; and means carried by said last named meansy adapted to be acted upon by the discharge of said steam to produce rotation of said forcing means said rotation producing means also serving to assist in theatomization and mixing of the fuel and steam.

2. In a fluid fuel burner, a bodyA member having fuel and .steam chambers; a tube providing a fuel discharge passage communieating with said fuel chamber; a sleeve surrounding said tube in spaced relation, providing an annular steam chamber; a screw rotatably mounted in said tube, extending' into said fuel chamber; and a propeller carried by said screw, adapted to be acted upon by the discharge of said steam to produce rotation of said' screw said propeller also serving to assist in the atomization of' said fuel and steam.

3. In a fluid fuel burner, a body member having fuel and steam chambers; a tube providing a fuel discharge passage communicating with said fuel chamber; a sleeve surrounding said tube in spaced relation,l

providing an annular 'steam discharge passage communicating with said steam chamber; means in said steam passage for. imparting a whirling motion to said steam as it is discharged; a screw rotatably mounted in said tube, extending into said fuel chamber; a propeller mounted on one end of said screw, adapted to be acted upon by the discharge of said steam to produce rotation of said screw; a fly wheel carried by said screw; and means carried by said body member for taking the end thrust ofsaid screw.

In testimony whereof I afiixmy signature.

` ORA HARROD. 

